Lithium and rubidium extraction from zinnwaldite by alkali digestion process: Sintering mechanism and leaching kinetics

0393120 - ÚGN 2014 RIV FI eng J - Článek v odborném periodiku
Vu, H. - Bernardi, J. - Jandová, J. - Vaculíková, Lenka - Goliáš, V.
Lithium and rubidium extraction from zinnwaldite by alkali digestion process: Sintering mechanism and leaching kinetics.
International Journal of Mineral Processing. Roč. 123, č. 1 (2013), s. 9-17. ISSN 0301-7516
Grant CEP: GA MŠMT ED2.1.00/03.0082
Institucionální podpora: RVO:68145535
Klíčová slova: zinnwaldite * lithium * rubidium * sintering mechanism * leaching kinetics
Kód oboru RIV: CB - Analytická chemie, separace
Impakt faktor: 1.461, rok: 2013
http://www.sciencedirect.com/science/article/pii/S0301751613001087

Lithium and rubidium were extracted from zinnwaldite sintering with CaCO3 powders and water leaching the obtained sinters - the alkali digestion process. The experimental results showed that sintering proceeded in three partly overlapping stages: (1) decomposition of zinnwaldite at temperature up to 800 °C, (2) formation of new phases in the temperature range between 750 and 835 °C, and (3) formation of amorphous glassy phase at temperature above 835 °C. The optimal extraction efficiencies of 84% of lithium and 91% of rubidium were achieved at sintering temperature of 825 °C and leaching temperature of 95 °C.
Trvalý link: http://hdl.handle.net/11104/0221877